Tenon for blind-slats



(No Model.)

A. KNEIP.- TENON FOR BLIND SL'ATS.

No. 446,781. Patented Feb. 17, 1891.

lNVENTOR.

wmvsssgs:

ATTORNEYS UNITED STATES PATENT OFFICE.

ANTON KNEIP, OF MASPETII, NEIV YORK.

TENON FOR BLlND-SLATS.

SPECIFICATION forming part of Letters Patent No. 446,781, dated February17, 1891.

Application filed August 21, 1890. Serial No. 362,631. (No model.)

To all whom it may concern:

Be it known that I, ANTON KNEIP, a citizen of the United States,residing at Maspeth, in the county of Queens and State of New York, haveinvented new and useful Improvements in Tenons for Blind-slats, of whichthe following is a specification.

This invention relates to that type of tubular sheet-metal teuons forblind-slats which are provided with projecting prongs or spurs for theirattachment to the window-slats to avoid the use of extraneous fasteningdevices, such as screws and nails.

The object of my invention is to provide a novel construction whereinthe sheet-metal tubular tenon is provided with a pair of arms extendingparallel with each other for the greater portion of their length toembrace the end of a wooden blind-slat, the construction being such thatthe extremity of one of such arms can be passed through the blindslatand interlocked with the opposite arm of the tenon.

The object of my invention I accomplish in the manner and by the meanshereinafter described and claimed, reference being made to theaccompanying drawings, in which Figure 1 is a perspective view of oneend portion of a blind-slat, showing my improved tenon applied thereto.Fig. 2 is a sectional view taken on the line 00 at, Fig. 1. Fig. 3 is adetail plan view of the tenon. Fig. 4 is a detail plan View of the blankfrom which the tenon is produced.

In order to enable those skilled in the art to make and use myinvention, I will now describe the same in detail, referring to thedrawings, wherein- The letter 13 indicates a wooden blind-slat, and theletter A, Fig. 4, a sheet-metal blank from which my improved tenon isconstructed. The blank is formed with a rectangularhead a and twoparallel arms I) b, one of which terminates at its free extremity in apointed prong or tongue-piece 0, while the other arm is provided with atransverse slot 0 of a size sufficient to receive the prong or tongue-piece, as hereinafter explained. The rectangular head a of the blankis bent into cylindrical shape to form the tubular tenon, and therebyplace the two arms I) b directly opposite each other and in parallelism.The prong or tonguepiece 0, formed on the extremity of the arm I), isbent at right angles to such arm, or approximately so, in order that theprong or tongue -piece can be readily inserted through the rectilinearslot 0 of the arm Z).

The wooden blind-slat B is adapted to be inserted between the two armsI) b of the tubular tenon, and the slat is provided with a transverseorifice through which to pass the prong or tongue-piece 0, so that thelatter can be passed through the rectilinear slots 0 and then beclinched down upon the arm I), as clearly shown in Fig. 1. By thispeculiar construction the two arms of the tenon are placed at oppositesides of the wooden blindslat, the tenon is located in coincidence withthe longitudinal axis of such slat, and the device is securely andsubstantially secured in position by the interlocking engagement of theprong or tongue-piece on one arm with the opposite arm. I am thusenabled to attach the tenon without the employment of screws or nailsand at the same time render it possible to conveniently and quicklydetach such tenon for the purpose of placing it on a new blind-slat whenoccasion demands, while on the other hand if the tenon should becomedamaged it can be easily renewed.

Heretofore a sheet-metal tubular tenon has been provided with headedspurs for attaching it to ablind-slat, and such, therefore, I do notclaim.

Having thus described my invention, what I claim is A sheet-metaltubular tenon formed intogral with a pair of oppositely-arranged arms,one of which is provided with a slot and the other with a prong ortongue-piece on its extremity arranged approximately at right angles tosuch arm to pass through the blindslat and enter into interlockingengagement with the opposite arm of the tenon, substantially as shownand described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

ANTOX KNEIP.

\Vitnesses:

WM. 0. I-IAUEF, ERNST F. KASTENHUBER.

